671092309 has 4 divisors (see below), whose sum is σ = 692740480. Its totient is φ = 649444140.

The previous prime is 671092291. The next prime is 671092327. The reversal of 671092309 is 903290176.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (671092291) and next prime (671092327).

It is a cyclic number.

It is not a de Polignac number, because 671092309 - 2¹⁵ = 671059541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671099309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10824039 + ... + 10824100.

It is an arithmetic number, because the mean of its divisors is an integer number (173185120).

Almost surely, 2^671092309 is an apocalyptic number.

It is an amenable number.

671092309 is a deficient number, since it is larger than the sum of its proper divisors (21648171).

671092309 is a wasteful number, since it uses less digits than its factorization.

671092309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21648170.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 671092309 is about 25905.4494074123. The cubic root of 671092309 is about 875.5092802313.

The spelling of 671092309 in words is "six hundred seventy-one million, ninety-two thousand, three hundred nine".